</td>
    <td valign="top"> <font face='宋體' size='2'> <br>
      isspace（測(cè)試字符是否為空格字符） </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 相關(guān)函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> isgraph<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> #include&lt;ctype.h&gt;<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 定義函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> int isspace(int c)<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 函數(shù)說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 檢查參數(shù)c是否為空格字符，也就是判斷是否為空格('')、定位字符('\t')、CR('\r')、換行('\n')、垂直定位字符('\v')或翻頁('\f')的情況。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 若參數(shù)c為空格字符，則返回TRUE，否則返回NULL(0)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數(shù)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 范例 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> /*將字符串str[]中內(nèi)含的空格字符找出，并顯示空格字符的ASCII碼*/<br>
      #include &lt;ctype.h&gt;<br>
      main()<br>
      {<br>
      char str="123c @# FD\tsP[e?\n";<br>
      int i;<br>
      for(i=0;str[i]!=0;i++)<br>
      if(isspace(str[i]))<br>
      printf("str[%d] is a white-space character:%d\n",i,str[i]);<br>
      }<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 執(zhí)行 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> str[4] is a white-space character:32<br>
      str[7] is a white-space character:32<br>
      str[10] is a white-space character:9 /* \t */<br>
      str[16] is a white-space character:10 /* \t */<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top">　 
      <div align="right"><br>
        <font face='宋體' size='2'><a name=linuxc10></a></font> </div>
    </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> <br>
        </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> <br>
      ispunct（測(cè)試字符是否為標(biāo)點(diǎn)符號(hào)或特殊符號(hào)） </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 相關(guān)函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> isspace，isdigit，isalpha<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> #inlude&lt;ctype.h&gt;<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 定義函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> int ispunct(int c)<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 函數(shù)說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 檢查參數(shù)c是否為標(biāo)點(diǎn)符號(hào)或特殊符號(hào)。返回TRUE也就是代表參數(shù)c為非空格、非數(shù)字和非英文字母。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> v若參數(shù)c為標(biāo)點(diǎn)符號(hào)或特殊符號(hào)，則返回TRUE，否則返回NULL(0)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數(shù)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 范例 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> /*列出字符串str中的標(biāo)點(diǎn)符號(hào)或特殊符號(hào)*/<br>
      #include &lt;ctype.h&gt;<br>
      main()<br>
      {<br>
      char str[]="123c@ #FDsP[e?";<br>
      int i;<br>
      for(i=0;str[i]!=0;i++)<br>
      if(ispunct(str[i])) printf("%c\n",str[i]);<br>
      }<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 執(zhí)行 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> v<br>
      @#[?<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top">　 
      <div align="right"><br>
        <font face='宋體' size='2'><a name=linuxc11></a></font> </div>
    </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> <br>
        </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> <br>
      isupper（測(cè)試字符是否為大寫英文字母） </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 相關(guān)函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> isalpha，islower<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> #include&lt;ctype.h&gt;<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 定義函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> int isupper(int c)<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 函數(shù)說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 檢查參數(shù)c是否為大寫英文字母。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 若參數(shù)c為大寫英文字母，則返回TRUE，否則返回NULL(0)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數(shù)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 范例 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> /*找出字符串str中為大寫英文字母的字符*/<br>
      #include &lt;ctype.h&gt;<br>
      main()<br>
      {<br>
      char str[]="123c@#FDsP[e?";<br>
      int i;<br>
      for(i=0;str[i]!=0;i++)<br>
      if(isupper(str[i])) printf("%c is an uppercase character\n",str[i]);<br>
      }<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 執(zhí)行 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> F is an uppercase character<br>
      D is an uppercase character<br>
      P is an uppercase character<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top">　 
      <div align="right"><br>
        <font face='宋體' size='2'><a name=linuxc12></a></font> </div>
    </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> <br>
        </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> <br>
      isxdigit（測(cè)試字符是否為16進(jìn)制數(shù)字） </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 相關(guān)函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> isalnum，isdigit<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 表頭文件 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> #include&lt;ctype.h&gt;<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 定義函數(shù) </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> int isxdigit (int c)<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 函數(shù)說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 檢查參數(shù)c是否為16進(jìn)制數(shù)字，只要c為下列其中一個(gè)情況則返回TRUE。16進(jìn)制數(shù)字:0123456789ABCDEF。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 返回值 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 若參數(shù)c為16進(jìn)制數(shù)字，則返回TRUE，否則返回NULL(0)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 附加說明 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 此為宏定義，非真正函數(shù)。<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 范例 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> /*找出字符串str中為十六進(jìn)制數(shù)字的字符*/<br>
      #include &lt;ctype.h&gt;<br>
      main()<br>
      {<br>
      char str[]="123c@#FDsP[e?";<br>
      int i;<br>
      for(i=0;str[i]!=0;i++)<br>
      if(isxdigit(str[i])) printf("%c is a hexadecimal digits\n",str[i]);<br>
      }<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top"> 
      <div align="right"><font face='宋體' size='2'> 執(zhí)行 </font> </div>
    </td>
    <td valign="top"> <font face='宋體' size='2'> 1 is a hexadecimal digits<br>
      2 is a hexadecimal digits<br>
      3 is a hexadecimal digits<br>
      c is a hexadecimal digits<br>
      F is a hexadecimal digits<br>
      D is a hexadecimal digits<br>
      e is a hexadecimal digits<br>
      </font> </td>
  </tr>
  <tr> 
    <td width="80" valign="top">　 
      <div align="right"><br>
      </div>
    </td>
  </tr>
</table>
</body>
</html>